CN112897480B - Pressure swing adsorption nitrogen production system and nitrogen production method thereof - Google Patents

Abstract

The invention relates to the technical field of gas preparation, in particular to a pressure swing adsorption nitrogen preparation system and a nitrogen preparation method thereof, wherein the pressure swing adsorption nitrogen preparation system comprises an air compressor, a compressed air filtering component, a buffer air storage tank, an adsorption tower group, a nitrogen tank, a connecting pipeline and a valve group, and is characterized in that: air compressor machine, compressed air filter component, buffering gas holder, adsorption tower group, nitrogen gas jar communicate through connecting line in proper order, valve group sets up on the connecting line, the input of air compressor machine is provided with filter equipment that admits air, and is used for admitting air of air compressor machine to filter, provides one kind can be to the filtration and the edulcoration of the first effect of admitting air of air compressor machine when preparing nitrogen gas, has reduced the frequency of later stage filtration equipment renew cartridge, reduction in production cost, reduces later stage filtration equipment's edulcoration pressure, guarantees later stage filtration equipment's filter effect's pressure swing adsorption nitrogen making system and nitrogen making method.

Description

Pressure swing adsorption nitrogen production system and nitrogen production method thereof

Technical Field

The invention relates to the technical field of gas preparation, in particular to a pressure swing adsorption nitrogen preparation system and a nitrogen preparation method thereof.

Background

The basic principle of pressure swing adsorption is to utilize the characteristic that the adsorbent has different adsorption capacities under different pressures for adsorbates and has selective adsorption for each component of the separated gas mixture under a certain pressure. Under the condition of selective adsorption of adsorbent, the impurity components in the raw material can be removed by pressure adsorption, and the adsorbent can be regenerated by removing these impurities by pressure reduction, so that the nitrogen gas in the air can be separated and used for preparing nitrogen gas.

The existing nitrogen making equipment generally adopts a carbon molecular sieve as an adsorbent, carbon molecules in the carbon molecular sieve are easily infected by water molecules, corrosive gas, acid gas, dust, oil molecules and the like to cause inactivation of the carbon molecules and reduction of activity, so that the performance of nitrogen making is reduced, and further, before the gas mixture is contacted with the adsorbent, the gas mixture needs to be fully filtered to prevent the carbon molecules in the carbon molecular sieve from being corroded, the existing nitrogen making equipment generally adopts an air compressor to suck and pressurize mixed air in the environment, the pressurized mixed air is filtered and decontaminated by a filtering device to enter an adsorption tower group to be acted with the adsorbent to make nitrogen, and because the air compressor lacks primary filtering and decontaminating when sucking the mixed air in the environment, dust accumulation and environmental dirt in an air duct of the air compressor can be caused, so that the filtering equipment needs to be frequently replaced by a filter element, leading to the increase of production cost to increase the impurity removal pressure of the filtering equipment and cause the phenomenon of poor filtering effect.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a pressure swing adsorption nitrogen production system and a nitrogen production method thereof, so as to solve the problems in the background technology.

The technical scheme of the invention is realized as follows: the utility model provides a pressure swing adsorption nitrogen system, includes air compressor machine, compressed air filter component, buffering gas holder, adsorption tower group, nitrogen gas jar, connecting line and valve group, its characterized in that: air compressor machine, compressed air filter component, buffering gas holder, adsorption tower group, nitrogen gas jar communicate through connecting line in proper order, valve group sets up on the connecting line, the input of air compressor machine is provided with filter equipment that admits air, and is used for admitting air of air compressor machine and filters, the filter equipment that admits air including the casing that is provided with cavity inner chamber, locate casing one side and with the air-supply line of casing inner chamber intercommunication setting, locate the fan in the air-supply line, locate the casing and just the surface is just to the multistage filter screen that the air-supply line set up, be close to multistage filter screen and install clearance mechanism on the casing, install in the casing outside and partly extend to the casing inner chamber spray edulcoration mechanism and for the air-supply line install the play tuber pipe on the casing, it is connected with the input of air compressor machine to go out the tuber pipe, the entrance point of air-supply line is provided with the screen panel.

Preferably: the cleaning mechanism comprises a first servo motor, a rotating rod, a plurality of groups of first conical gears, a plurality of groups of lead screws, a plurality of groups of guide rods, a plurality of groups of second conical gears and a plurality of groups of cleaning brushes, wherein the first servo motor is fixedly arranged on the outer side wall of the shell, one end of the rotating rod is fixedly connected with the output end of the first servo motor in a coaxial manner, the other end of the rotating rod penetrates into the shell and is rotationally connected with the inner wall of the shell, the plurality of groups of first conical gears are fixedly sleeved on the rotating rod in a coaxial manner, the plurality of groups of lead screws are respectively vertically arranged in the shell corresponding to the multi-stage filter screens, both ends of the lead screws are respectively rotationally connected with the top and the bottom of the inner cavity of the shell, the plurality of groups of guide rods are respectively arranged on one side of each group of lead screws in a parallel manner, both ends of the guide rods are respectively fixedly connected with the top and the bottom of the inner cavity of the shell, the plurality of second conical gears are respectively fixedly sleeved on the plurality of groups of lead screws and are respectively meshed with the plurality of first conical gears, the multiunit the cleaning brush is hugged closely the setting with the windward side of multistage filter screen respectively, multiunit the equal fixedly connected with cooperation piece of one end of cleaning brush, it is a plurality of cooperation piece is threaded connection respectively on the multiunit lead screw and sliding connection is on the multiunit guide bar.

Preferably: the multistage filter screen includes that the interval locates filter screen one, filter screen two and filter screen three in the casing in proper order from the air-supply line to the tuber pipe, filter screen one, filter screen two and filter screen three separate the inner chamber of casing for four cavities, the mesh number of filter screen one, filter screen two and filter screen three increases in proper order.

Preferably: spray edulcoration mechanism and include water storage box, water pump, outlet pipe, charging means, cross joint, four catheter and four atomizer, one side of casing is located to the water storage box, the water pump is located in the water storage box, the water storage box sets up with outlet pipe intercommunication, the one end and the cross joint input connection that the water storage box was kept away from to the outlet pipe are four the one end of catheter communicates with the output of cross joint respectively, and the other end runs through respectively and extends to four chambeies in, four atomizer installs respectively in four chambeies, and with extend to catheter intercommunication sets up in four chambers, the charging means is connected on the outlet pipe.

Preferably: the feeder comprises a valve body group formed by a plurality of feeding valve components in an integrated manner, a liquid inlet and a liquid outlet arranged on the valve body group, and an electromagnetic control assembly arranged in each feeding valve component, wherein the liquid inlet and the liquid outlet are communicated with the water outlet pipe; the charging valve comprises a charging opening, a first valve seat, a second valve seat, an inner cavity and a channel in a split manner, the inlet side of the first valve seat is communicated with the charging opening, one end of the channel is communicated with the liquid inlet, the other end of the channel is communicated with the inlet of the second valve seat, the outlet sides of the first valve seat and the second valve seat are communicated with the inner cavity, the first valve seat and the second valve seat correspond to the electromagnetic control assembly, the outlet side of the first valve seat and the outlet side of the second valve seat coaxially correspond to each other in the inner cavity in an opposite way and are separated by a distance, the plugging cap of the electromagnetic control assembly is positioned in the range of the separated distance between the outlet side of the first valve seat and the outlet side of the second valve seat, and the plugging plug closes the first valve seat and opens the second valve seat under normal conditions, the inner cavity of the split charging valve is communicated with the channel of the split charging valve adjacent to the split charging valve, and the inner cavity of the split charging valve far away from the liquid inlet in the valve body group is communicated with the liquid outlet.

Preferably: the lower extreme of casing inside is provided with the liquid collecting bucket, the bottom intercommunication of liquid collecting bucket is provided with the first drain pipe that runs through and extend to the casing outside.

Preferably: it is provided with dehumidification mechanism in the tuber pipe to go out, dehumidification mechanism is fixed in the active carbon filter pulp on the first otter board and is on a parallel with first otter board and active carbon filter pulp's the other end fixed connection's second otter board including fixed first otter board, a plurality of one end that set up in the tuber pipe, the inner wall swing joint of second otter board and outlet duct, and one side of second otter board is provided with the cylinder that drives the second otter board and remove to first otter board.

Preferably: and a liquid receiving tank is arranged on the wall of the air outlet pipe at the bottom of the first screen plate, and a second liquid discharge pipe which penetrates through the air outlet pipe and extends to the outer side of the air outlet pipe is communicated with the bottom of the liquid receiving tank.

A method for pressure swing adsorption nitrogen production using a pressure swing adsorption nitrogen production system as claimed in any one of claims 1 to 9, comprising the steps of:

s1, primary impurity removal by air intake: sucking ambient air through an air inlet filtering device, and primarily filtering the sucked ambient air;

s2, intake air pressurization: the ambient air after the step S1 enters an air compressor, and the air compressor pressurizes the ambient air to obtain a compressed mixed gas;

s3, secondary impurity removal of air inflow: the compressed mixed gas obtained in the step S2 enters a compressed air filtering component for secondary filtering and impurity removal;

s4, air inlet buffer: the compressed mixed gas subjected to the secondary impurity removal in the step S3 enters a buffer gas storage tank for storage and buffering;

s5, nitrogen preparation and purification: in the step S4, the compressed mixed gas in the buffer gas storage tank is output into the adsorption tower group through the regulation of the valve group to be circularly and alternately adsorbed to generate nitrogen;

s6, nitrogen storage: the nitrogen gas generated in step S5 is stored in a nitrogen gas tank.

Preferably: step S1, the primary impurity removal of the air inlet further comprises the following steps:

a1, induced draft filtering: a fan in the air inlet pipe is started to suck ambient air, and a mesh enclosure arranged at the inlet end of the air inlet pipe filters the ambient air;

a2, primary impurity removal: starting a water pump in the water tank, adding a corresponding impurity removal medicament into a feed inlet of the feeder, starting a corresponding electromagnetic valve in the feeder, mixing water extracted from the water tank by the water pump with the impurity removal medicament, and injecting the mixture into an inner cavity of the shell through an atomizing nozzle to ensure that partial impurities in ambient air are fused with the water and the chemical medicament and are subjected to chemical reaction and removed;

a3, primary fine filtration: after the air compressor is started, the ambient air in the shell is filtered by the filter screen I, the filter screen II and the filter screen III in multiple stages, solid particles floating in the ambient air are filtered, and the filtered solid particles enter the air outlet pipe;

a4, dehumidification: and D, contacting the ambient air subjected to the step A3 with the activated carbon filter cotton in the air outlet pipe to remove water vapor in the ambient air.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the air compressor, the air inlet filtering device is used for preliminarily filtering and removing impurities from the air inlet of the air compressor, so that floating objects in the ambient air are reduced, dust accumulation and environmental dirt adhesion in an air duct of the air compressor are prevented, chemical impurities in the ambient air are reduced, the frequency of replacing a filter element of later-stage filtering equipment is reduced, the production cost is reduced, the impurity removing pressure of the later-stage filtering equipment is reduced, and the filtering effect of the later-stage filtering equipment is ensured;

2. the air inlet filtering device can clean the filtering net in the device, so that the cost for replacing the filtering net is reduced, and meanwhile, the phenomenon of blockage when the ambient air is filtered can be effectively avoided by cleaning the filtering net;

3. the air inlet filtering device is provided with the spraying impurity removal mechanism for removing impurities from particles and chemical substances in ambient air, the spraying impurity removal mechanism is provided with the feeder, different medicaments can be fed, one or more medicaments can be selected and simultaneously injected by controlling the electromagnetic assembly in the feeder during feeding, the medicament feeding process is facilitated, meanwhile, the inner pipeline in the feeder can be cleaned by controlling the electromagnetic assembly in the feeder, and later equipment maintenance is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a view showing the internal structure of an intake air filtering apparatus according to an embodiment of the present invention;

FIG. 3 is a sectional view of the spraying and impurity removing mechanism according to the embodiment of the present invention;

FIG. 4 is a sectional view showing the structure of a feeder according to an embodiment of the present invention;

fig. 5 is a structural sectional view of a split charging valve in the embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference is made in detail to fig. 1-5 of the drawings for various embodiments of the invention.

The invention discloses a pressure swing adsorption nitrogen making system, which comprises an air compressor 1, a compressed air filtering component 2, a buffer air storage tank 3, an adsorption tower group 4, a nitrogen tank 5, a connecting pipeline 6 and a valve group 7, wherein in the specific embodiment of the invention, the air compressor 1, the compressed air filtering component 2, the buffer air storage tank 3, the adsorption tower group 4 and the nitrogen tank 5 are sequentially communicated through the connecting pipeline, the valve group 7 is arranged on the connecting pipeline 6, an inlet air filtering device 8 is arranged at the input end of the air compressor 1 and is used for inlet air filtration of the air compressor 1, the inlet air filtering device 8 comprises a shell 81 provided with a hollow inner cavity, an inlet air pipe 82 arranged at one side of the shell 81 and communicated with the inner cavity of the shell 81, a fan 83 arranged in the inlet air pipe 82, a multi-stage filter screen 84 arranged in the shell 81 and with the surface opposite to the inlet air pipe 82, and a cleaning mechanism 85 arranged on the shell 81 and close to the multi-stage filter screen 84, Install in the casing 81 outside and the part extends to the spray edulcoration mechanism 86 of casing 81 inner chamber and for air-out pipe 87 of air-supply line 82 installation on casing 81, it is connected with the input of air compressor machine 1 to go out pipe 87, the entrance point of air-supply line 82 is provided with screen panel 88.

By adopting the technical scheme, ambient air is pressurized by the air compressor to obtain compressed mixed gas, the compressed mixed gas is conveyed into the compressed air filtering component through the connecting pipeline, the compressed air filtering component filters, removes impurities and dehumidifies the compressed mixed gas to obtain clean compressed mixed gas, the clean compressed mixed gas is conveyed into the buffer air storage tank for buffer storage, the clean compressed mixed gas in the buffer air storage tank alternately and circularly enters the adsorption tower set through the control of the connecting pipeline and the valve set to be circularly and alternately adsorbed to generate nitrogen, the generated nitrogen is conveyed into the nitrogen tank for storage, the air inlet filtering device is arranged at the input end of the air compressor to preliminarily filter and remove impurities of the air inlet of the air compressor, floaters in the ambient air are reduced, dust accumulation and environmental dirt adhesion in an air duct of the air compressor are prevented, and chemical impurities in the ambient air are reduced, the frequency of replacing the filter element of the later-stage filtering equipment is reduced, the production cost is reduced, the impurity removal pressure of the later-stage filtering equipment is reduced, and the filtering effect of the later-stage filtering equipment is ensured; the fan in the air-supply line that adopts to set up induced drafts, the entrance point of air-supply line is provided with the screen panel and carries out preliminary isolation to the large-scale floater in the ambient air and filters, the multistage filter screen that sets up carries out stage filter to the particle in the ambient air, the edulcoration is carried out to the chemical substance in the environment to the edulcoration mechanism that sprays that sets up, the clearance mechanism that sets up can clear up multistage filter screen, effectively avoid taking place the phenomenon of jam when filtering ambient air, the produced cost of change filter screen has been lacked.

In the embodiment of the present invention, the cleaning mechanism 85 includes a first servo motor 851, a rotating rod 852, a plurality of sets of first bevel gears 853, a plurality of sets of screw rods 854, a plurality of sets of guide rods 855, a plurality of sets of second bevel gears 856 and a plurality of sets of cleaning brushes 857, the first servo motor 851 is fixedly installed on the outer side wall of the housing 81, one end of the rotating rod 852 is coaxially and fixedly connected with the output end of the first servo motor 851, and the other end penetrates into the interior of the housing 81 to be rotatably connected with the inner wall of the housing 81, the plurality of sets of first bevel gears 853 are coaxially and fixedly connected to the rotating rod 852, the plurality of sets of screw rods 863 are respectively and vertically installed in the housing 81 corresponding to the multi-stage filter screens 84, and both ends of the screw rods are respectively and rotatably connected with the top and the bottom of the inner cavity of the housing 81, the plurality of sets of guide rods 855 are respectively and parallelly installed on one side of each set of the screw rods 854, and both ends of the guide rods are respectively and fixedly connected with the top and the bottom of the inner cavity of the housing 81, the multiunit the second bevel gear 856 fixes cup joint respectively on multiunit lead screw 854, and respectively with the meshing of the first bevel gear 853 of multiunit, the multiunit the setting is hugged closely with multistage filter screen 84's windward side respectively to cleaning brush 857's the equal fixedly connected with cooperation piece 8571 of one end, it is a plurality of cooperation piece 8571 is threaded connection respectively on multiunit lead screw 854 and sliding connection is on multiunit guide bar 855.

By adopting the technical scheme: the first servo motor is started, the output end of the first servo motor drives the rotating rod to synchronously rotate, the first bevel gear on the rotating rod and the rotating rod synchronously rotate, the first bevel gear synchronously drives the second bevel gear to rotate, the screw rod fixedly connected with the second bevel gear rotates, and the matching block which is guided and positioned by the guide rod and in threaded connection with the screw rod moves upwards or downwards on the guide rod and the screw rod, so that the cleaning brush is driven to brush upwards or downwards on the surface of the multi-stage filter screen, further controlling the output end of the first servo motor to alternatively rotate forwards and backwards, and the cleaning brush can scrape the surface of the multistage filter screen up and down in a reciprocating manner, and then clear up the surface of multi-stage filter screen, avoid taking place the phenomenon of jam when filtering ambient air, simultaneously, reduced because multi-stage filter screen blocks up two cost problems that cause the change filter screen.

In the specific embodiment of the present invention, the multistage filter screen 84 includes a first filter screen 841, a second filter screen 842 and a third filter screen 843 which are sequentially arranged in the housing 81 from the air inlet pipe 82 to the air outlet pipe 87 at intervals, the first filter screen 841, the second filter screen 842 and the third filter screen 843 divide the inner cavity of the housing 81 into four chambers, and the mesh number of the first filter screen 841, the second filter screen 842 and the third filter screen 843 is sequentially increased.

Through adopting the above technical scheme, the multistage filter screen that sets up is for locating filter screen one in the casing from the air-supply line to the play tuber pipe interval in proper order, filter screen two and filter screen three, and filter screen one, the mesh number of filter screen two and filter screen three increases in proper order, carry out progressive filtration to ambient air, improve the filter effect to ambient air, and in filterable, effectively avoided big particle to block up the filter screen that the mesh is little, guarantee the air permeability in the casing, net one, filter screen two and filter screen three separate the inner chamber of casing for four cavities, conveniently spray the ambient air of edulcoration mechanism in to the casing and spray the edulcoration.

In the embodiment of the present invention, the spraying and impurity removing mechanism 86 includes a water storage tank 861, a water pump 862, a water outlet pipe 863, a feeder 864, a four-way joint 865, four liquid guide pipes 866, and four atomizing nozzles 867, the water storage tank 861 is disposed at one side of the housing 81, the water pump 862 is disposed in the water storage tank 861, the water storage tank 861 is communicated with the water outlet pipe 863, one end of the water outlet pipe 863, which is far away from the water storage tank 861, is connected to an input end of the four-way joint 865, one ends of the four liquid guide pipes 866 are respectively communicated with an output end of the four-way joint 865, and the other ends of the four liquid guide pipes respectively extend into four cavities, the four atomizing nozzles 867 are respectively installed in the four cavities and are communicated with the liquid guide pipes 866 extending into the four cavities, and the feeder 864 is connected to the water outlet pipe 863.

Through adopting above-mentioned technical scheme, open the water pump, retaining in the cistern is pumped to in the outlet pipe, reposition of redundant personnel through four way connection, enter into four drain pipes, form water smoke through atomizer again, spray in four cavities in the casing, reach the effect to the ambient air dust fall in the casing, add the medicament in the charging means simultaneously, the medicament mixes in the aquatic, and then spray to four cavities in the casing, reach the effect to chemical removal in the ambient air in the casing, multistage filter screen has divided into four cavities with the inner chamber of casing, through spraying the medicament mixture to four cavities simultaneously, the efficiency of edulcoration has been improved.

In the embodiment of the present invention, the charger 864 includes a valve body group 8641 integrally formed by a plurality of charging valve sub-bodies 100, a liquid inlet 8642 and a liquid outlet 8643 provided on the valve body group 8641, and an electromagnetic control module 8644 provided in each charging valve sub-body 100, wherein the liquid inlet 8642 and the liquid outlet 8642 are communicated with the water outlet pipe 863, and the electromagnetic control module 8644 includes an electromagnetic coil 86441, a blocking plug 86442 and an iron core 86443 provided in a guide sleeve in the electromagnetic coil 86441, a compression spring 86444 provided between the blocking plug 86442 and the iron core 86443, and a blocking cap 86445 provided at the front end of the blocking plug 86442; the charging valve split body 100 comprises a charging opening 101, a first valve seat 102, a second valve seat 103, an inner cavity 104 and a channel 105, wherein the inlet side of the first valve seat 102 is communicated with the charging opening 101, one end of the channel 105 is communicated with a liquid inlet 8642, the other end of the channel 105 is communicated with the inlet of the second valve seat 103, the outlet sides of the first valve seat 102 and the second valve seat 103 are communicated with the inner cavity 104, the first valve seat 102 and the second valve seat 103 correspond to an electromagnetic control assembly 8644, the outlet sides of the first valve seat 102 and the second valve seat 103 are coaxially opposite in the inner cavity and are separated by a distance, a blocking cap 86445 of the electromagnetic control assembly 8644 is positioned in the range of the distance between the outlet side of the first valve seat 102 and the outlet side of the second valve seat 103, and a blocking plug 86442 closes the first valve seat 102 in a normal state to open the second valve seat 103, the inner cavity 104 of the charging valve split body 100 is communicated with the channel 105 of the adjacent charging valve 100, the inner cavity 104 of the charging valve split body 100, which is far away from the liquid inlet 8642, in the valve body group 8641 is communicated with the liquid outlet 8643.

By adopting the technical scheme, various medicaments can be respectively communicated to the valve body group, each medicament corresponds to each feeding valve body and is respectively communicated with the feeding port on each feeding valve body, the medicaments are filled into the water outlet pipe by generating negative pressure when passing through water through the water outlet pipe by controlling the electromagnetic control assembly on each feeding valve body, different medicaments can be filled, one or more medicaments can be selected to be filled simultaneously by controlling the electromagnetic assembly in the feeder during feeding, the process of adding the medicaments is facilitated, the medicament filling efficiency is improved, meanwhile, the inner pipeline in the feeder can be cleaned by controlling the electromagnetic assembly in the feeder, and the later equipment maintenance is facilitated;

the working principle is as follows: when the electromagnetic coil is electrified, the plugging plug is attracted by the magnetic iron core, the compression spring is compressed, the plugging plug retracts backwards, the rear side of the plugging plug cap is close to the outlet side of the second valve seat, the front side of the plugging plug cap leaves the outlet side of the first valve seat, namely, the plugging plug cap closes the second valve seat to open the first valve seat, the negative pressure pump is started to generate negative pressure, so that a medicament can enter from the charging opening, enters the inner cavity through the first valve seat, enters the passage of the adjacent charging valve split bodies, then enters the inner cavity of the adjacent charging valve split body, sequentially passes through the plurality of charging valve split bodies, and then is introduced into the liquid outlet from the inner cavity of the last charging valve split body until entering the material guide pipe; when the electromagnetic coil is not electrified, the plugging plug and the iron core extend forwards under the action of the compression spring, the front side of the plugging plug cap is close to the outlet side of the first valve seat, the rear side of the plugging plug cap leaves the outlet side of the second valve seat, the mechanical plugging plug cap closes the first valve seat to open the second valve seat, water is introduced into the water inlet pipe, enters the inner cavity through the first valve seat via the channel and then enters the channel of the adjacent charging valve split body, enters the inner cavity of the adjacent charging valve split body after entering the channel of the adjacent charging valve split body, and is introduced into the water outlet from the inner cavity of the last charging valve split body after sequentially passing through the plurality of charging valve split bodies until entering the water outlet pipe, so that the pipeline is cleaned.

In the embodiment of the present invention, a liquid collecting bucket 8101 is disposed at a lower end inside the housing 81, and a first liquid discharging pipe 8102 extending through the housing 81 is disposed at a bottom of the liquid collecting bucket 8101.

Through adopting above-mentioned technical scheme, spray edulcoration mechanism and spray the medicament to the inner chamber of casing, during the waste liquid gets into the collecting hopper, clearance mechanism cleared up multistage filter screen, and the waste residue on the multistage filter screen drops in the waste liquid of collecting hopper, through the mixture discharge casing inner chamber of first drain pipe with waste liquid and waste residue again, reaches the effect of blowdown.

In a specific embodiment of the invention, a dehumidifying mechanism 871 (not labeled in the figure) is arranged in the air outlet pipe 87, the dehumidifying mechanism 871 includes a first mesh plate 8711 fixedly arranged in the air outlet pipe 87, a plurality of activated carbon filter cotton 8712 with one end fixed on the first mesh plate 8711, and a second mesh plate 8713 parallel to the first mesh plate 8711 and fixedly connected with the other end of the activated carbon filter cotton 8712, the second mesh plate 8713 is movably connected with the inner wall of the air outlet pipe 87, and an air cylinder 8714 for driving the second mesh plate 8713 to move towards the first mesh plate 8711 is arranged at one side of the second mesh plate 8713.

By adopting the technical scheme, after the air compressor is started, ambient air in the shell enters the air outlet pipe and contacts with the activated carbon filter cotton in the air outlet pipe, water vapor in the ambient air is removed, the air cylinder is started, the output arm of the air cylinder drives the second screen plate to move towards the first screen plate, the activated carbon filter cotton is extruded, liquid absorbed in the activated carbon filter cotton is extruded, the activated carbon filter cotton obtains water absorption again, the air cylinder is closed, the output arm of the air cylinder resets, and the activated carbon filter cotton recovers the working state.

In the specific embodiment of the invention, a liquid receiving tank 8701 is arranged on the wall of the air outlet pipe 87 at the bottom of the first net plate 8711, and a second liquid discharging pipe 8702 penetrating and extending to the outer side of the air outlet pipe 87 is communicated with the bottom of the liquid receiving tank 8701.

Through adopting above-mentioned technical scheme, the liquid inflow that the active carbon filter pulp extruded connects the cistern, and rethread second fluid-discharge tube discharges out the tuber pipe, avoids during liquid becomes steam sneaks into ambient air.

A method for pressure swing adsorption nitrogen production using a pressure swing adsorption nitrogen production system as claimed in any one of claims 1 to 9, comprising the steps of:

s1, introducing air for primary impurity removal: sucking ambient air through an air inlet filtering device, and primarily filtering the sucked ambient air;

s2, intake air pressurization: the ambient air after the step S1 enters the air compressor, and the air compressor pressurizes the ambient air to obtain a compressed mixed gas;

s3, secondary impurity removal of air inflow: the compressed mixed gas obtained in the step S2 enters a compressed air filtering component for secondary filtering and impurity removal;

s4, air inlet buffer: the compressed mixed gas subjected to the secondary impurity removal in the step S3 enters a buffer gas storage tank for storage and buffering;

s5, nitrogen preparation and purification: in the step S4, the compressed mixed gas in the buffer gas storage tank is output into the adsorption tower group through the regulation of the valve group to be circularly and alternately adsorbed to generate nitrogen;

s6, nitrogen storage: the nitrogen gas generated in step S5 is stored in a nitrogen gas tank.

Preferably, the following components are used: step S1, the primary impurity removal of the air inlet further comprises the following steps:

a1, induced draft filtering: a fan in the air inlet pipe is started to suck ambient air, and a mesh enclosure arranged at the inlet end of the air inlet pipe filters the ambient air;

a2, primary impurity removal: starting a water pump in the water tank, adding a corresponding impurity removal medicament into a feed inlet of the feeder, starting a corresponding electromagnetic valve in the feeder, mixing water extracted from the water tank by the water pump with the impurity removal medicament, and injecting the mixture into an inner cavity of the shell through an atomizing nozzle to ensure that partial impurities in ambient air are fused with the water and the chemical medicament and are subjected to chemical reaction and removed;

a3, primary fine filtration: after the air compressor is started, the ambient air in the shell is filtered by the filter screen I, the filter screen II and the filter screen III in multiple stages, solid particles floating in the ambient air are filtered, and the filtered solid particles enter the air outlet pipe;

a4, dehumidification: and D, contacting the ambient air subjected to the step A3 with the activated carbon filter cotton in the air outlet pipe to remove water vapor in the ambient air.

In conclusion, the pressure swing adsorption nitrogen making system and the nitrogen making method thereof provided by the invention can be used for filtering and removing impurities of the air inlet of the air compressor in an initial effect during nitrogen preparation, reducing the frequency of replacing a filter element of the later-stage filtering equipment, reducing the production cost, reducing the impurity removing pressure of the later-stage filtering equipment and ensuring the filtering effect of the later-stage filtering equipment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. The utility model provides a pressure swing adsorption nitrogen system, includes air compressor machine, compressed air filter component, buffering gas holder, adsorption tower group, nitrogen gas jar, connecting line and valve group, its characterized in that: the air compressor, the compressed air filtering component, the buffer air storage tank, the adsorption tower group and the nitrogen tank are sequentially communicated through a connecting pipeline, the valve group is arranged on the connecting pipeline, an air inlet filtering device is arranged at the input end of the air compressor and used for filtering inlet air of the air compressor, the air inlet filtering device comprises a shell body with a hollow inner cavity, an air inlet pipe, a fan, a multistage filter screen, a cleaning mechanism, a spraying impurity removing mechanism and an air outlet pipe, wherein the shell body is arranged on one side of the shell body and is communicated with the inner cavity of the shell body, the fan is arranged in the air inlet pipe, the multistage filter screen is arranged in the shell body, the surface of the multistage filter screen is just opposite to the air inlet pipe, the cleaning mechanism is close to the multistage filter screen and is arranged on the shell body, the spraying impurity removing mechanism is arranged outside the shell body and partially extends to the inner cavity of the shell body, the air outlet pipe is arranged on the shell body relative to the air inlet pipe, the air outlet pipe is connected with the input end of the air compressor, and a mesh cover is arranged at the inlet end of the air inlet pipe;

the spraying impurity removal mechanism comprises a water storage tank, a water pump, a water outlet pipe, a feeder, a four-way joint, four liquid guide pipes and four atomizing nozzles, wherein the water storage tank is arranged on one side of the shell, the water pump is arranged in the water storage tank, the water storage tank is communicated with the water outlet pipe, one end, away from the water storage tank, of the water outlet pipe is connected with the input end of the four-way joint, one ends of the four liquid guide pipes are respectively communicated with the output end of the four-way joint, the other ends of the four liquid guide pipes respectively penetrate through and extend into the four cavities, the four atomizing nozzles are respectively arranged in the four cavities and are communicated with the liquid guide pipes extending into the four cavities, and the feeder is connected to the water outlet pipe;

the feeder comprises a valve body group formed by a plurality of feeding valve components in an integrated manner, a liquid inlet and a liquid outlet arranged on the valve body group, and an electromagnetic control assembly arranged in each feeding valve component, wherein the liquid inlet and the liquid outlet are communicated with the water outlet pipe; the charging valve comprises a charging opening, a first valve seat, a second valve seat, an inner cavity and a channel in a split manner, the inlet side of the first valve seat is communicated with the charging opening, one end of the channel is communicated with the liquid inlet, the other end of the channel is communicated with the inlet of the second valve seat, the outlet sides of the first valve seat and the second valve seat are communicated with the inner cavity, the first valve seat and the second valve seat correspond to the electromagnetic control assembly, the outlet side of the first valve seat and the outlet side of the second valve seat coaxially correspond to each other in the inner cavity in an opposite direction and are separated by a distance, the plugging cap of the electromagnetic control assembly is positioned in the range of the separated distance between the outlet side of the first valve seat and the outlet side of the second valve seat, and the plugging plug closes the first valve seat and opens the second valve seat under normal conditions, the inner cavity of the split charging valve is communicated with the channel of the split charging valve adjacent to the split charging valve, and the inner cavity of the split charging valve far away from the liquid inlet in the valve body group is communicated with the liquid outlet.

2. The pressure swing adsorption nitrogen generation system of claim 1, wherein: the cleaning mechanism comprises a first servo motor, a rotating rod, a plurality of groups of first conical gears, a plurality of groups of lead screws, a plurality of groups of guide rods, a plurality of groups of second conical gears and a plurality of groups of cleaning brushes, wherein the first servo motor is fixedly arranged on the outer side wall of the shell, one end of the rotating rod is fixedly connected with the output end of the first servo motor in the same axle center, the other end of the rotating rod penetrates into the shell and is rotatably connected with the inner wall of the shell, the plurality of groups of first conical gears are fixedly sleeved on the rotating rod in the same axle center, the plurality of groups of lead screws are vertically arranged in the shell corresponding to the multi-stage filter screens respectively, both ends of each lead screw are rotatably connected with the top and the bottom of the inner cavity of the shell respectively, the plurality of groups of guide rods are respectively arranged on one side of each group of lead screws in parallel, both ends of the guide rods are fixedly connected with the top and the bottom of the inner cavity of the shell respectively, the plurality of second conical gears are fixedly sleeved on the plurality of groups of lead screws respectively and are meshed with the plurality of first conical gears respectively, the multiunit the cleaning brush is hugged closely the setting with the windward side of multistage filter screen respectively, multiunit the equal fixedly connected with cooperation piece of one end of cleaning brush, it is a plurality of cooperation piece is threaded connection respectively on the multiunit lead screw and sliding connection is on the multiunit guide bar.

3. The pressure swing adsorption nitrogen generation system of claim 2, wherein: the multistage filter screen includes that the interval locates filter screen one, filter screen two and filter screen three in the casing in proper order from the air-supply line to the tuber pipe, filter screen one, filter screen two and filter screen three separate the inner chamber of casing for four cavities, the mesh number of filter screen one, filter screen two and filter screen three increases in proper order.

4. The pressure swing adsorption nitrogen generation system of claim 3, wherein: the lower extreme of casing inside is provided with the liquid collecting bucket, the bottom intercommunication of liquid collecting bucket is provided with the first drain pipe that runs through and extend to the casing outside.

5. The pressure swing adsorption nitrogen generation system of claim 1, wherein: it is provided with dehumidification mechanism in the tuber pipe to go out, dehumidification mechanism is fixed in the active carbon filter pulp on the first otter board and is on a parallel with first otter board and active carbon filter pulp's the other end fixed connection's second otter board including fixed first otter board, a plurality of one end that set up in the tuber pipe, the inner wall swing joint of second otter board and outlet duct, and one side of second otter board is provided with the cylinder that drives the second otter board and remove to first otter board.

6. The pressure swing adsorption nitrogen generation system of claim 5, wherein: and a liquid receiving tank is arranged on the wall of the air outlet pipe at the bottom of the first screen plate, and a second liquid discharge pipe which penetrates through and extends to the outer side of the air outlet pipe is communicated with the bottom of the liquid receiving tank.

7. A method for pressure swing adsorption nitrogen production using a pressure swing adsorption nitrogen production system as claimed in any one of claims 1 to 6, comprising the steps of:

s1, primary impurity removal by air intake: sucking ambient air through an air inlet filtering device, and primarily filtering the sucked ambient air;

s2, intake air pressurization: the ambient air after the step S1 enters the air compressor, and the air compressor pressurizes the ambient air to obtain a compressed mixed gas;

s3, secondary impurity removal by air inlet: the compressed mixed gas obtained in the step S2 enters a compressed air filtering component for secondary filtering and impurity removal;

s4, air inlet buffer: the compressed mixed gas subjected to the secondary impurity removal in the step S3 enters a buffer gas storage tank for storage and buffering;

s5, nitrogen preparation and purification: in the step S4, the compressed mixed gas in the buffer gas storage tank is output into the adsorption tower group through the regulation of the valve group to be circularly and alternately adsorbed to generate nitrogen;

s6, nitrogen storage: the nitrogen gas generated in step S5 is stored in a nitrogen gas tank.

8. The pressure swing adsorption nitrogen production method of claim 7, wherein: step S1, the primary impurity removal of the air inlet further comprises the following steps:

a1, induced draft filtering: a fan in the air inlet pipe is started to suck ambient air, and a mesh enclosure arranged at the inlet end of the air inlet pipe filters the ambient air;

a2, primary impurity removal: starting a water pump in the water tank, adding a corresponding impurity removal medicament into a feed inlet of the feeder, starting a corresponding electromagnetic valve in the feeder, mixing water extracted from the water tank by the water pump with the impurity removal medicament, and injecting the mixture into an inner cavity of the shell through an atomizing nozzle to ensure that partial impurities in ambient air are fused with the water and the chemical medicament and are subjected to chemical reaction and removed;

a3, primary fine filtration: after the air compressor is started, the ambient air in the shell is filtered by the filter screen I, the filter screen II and the filter screen III in multiple stages, solid particles floating in the ambient air are filtered, and the filtered solid particles enter the air outlet pipe;

a4, dehumidification: and D, contacting the ambient air subjected to the step A3 with the activated carbon filter cotton in the air outlet pipe to remove water vapor in the ambient air.

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